Kuyini ukunamathela kwethusi?
Okubizwa ngokuthi ukuthulula kwethusi ukusebenzisa indawo engasetshenziswanga
PCB njengendawo eyinkomba bese uyigcwalisa ngethusi eliqinile.Lezi zindawo zethusi zibizwa nangokuthi ukugcwaliswa kwethusi.
Ukubaluleka kwe-copper coating ukunciphisa i-impedance yocingo oluphansi nokuthuthukisa ikhono lokulwa nokuphazamiseka;ukunciphisa ukwehla kwamandla kagesi futhi kuthuthukise ukusebenza kahle kokunikezwa kwamandla;uma ixhunywe ocingweni lwaphansi, inganciphisa nendawo ye-loop.
Futhi ngenjongo yokwenza i-PCB ingakhubazeki ngangokunokwenzeka ngesikhathi sokudayiswa, abakhiqizi abaningi be-PCB bazophinde badinge abaklami be-PCB ukuthi bagcwalise indawo evulekile ye-PCB ngezintambo zomhlabathi zethusi noma ezinjengegridi.Uma ithusi lingaphathwa kahle, liyoba Uma inzuzo ingakufanelekeli ukulahlekelwa, ingabe ukugqoka kwethusi "kunezinzuzo eziningi kunezimo ezimbi" noma "ibubi ngaphezu kwezinzuzo"?
Wonke umuntu uyazi ukuthi esimweni sokuvama okuphezulu, i-capacitance esabalalisiwe ye-wiring ebhodini lesifunda ephrintiwe izosebenza.Uma ubude bukhulu kuno-1/20 we-wavelength ehambisanayo yefrikhwensi yomsindo, umphumela we-antenna uzokwenzeka, futhi umsindo uzokhishwa ngezintambo.Uma kukhona ukuthululelwa kwethusi eliphansi kahle ku-PCB, ukuthululwa kwethusi kuba yithuluzi lokusabalalisa umsindo.
Ngakho-ke, kumjikelezo we-high-frequency, ungacabangi ukuthi ucingo oluphansi luxhunywe phansi endaweni ethile.Indiza ephansi ye-laminate "umhlabathi omuhle".Uma ukugqoka kwethusi kusingathwa kahle, ukugqoka kwethusi akugcini nje ukwandisa okwamanje, kodwa futhi kudlala indima emibili yokuphazanyiswa kokuvikela.
Izinhlobo ezimbili ze-copper coating
Ngokuvamile kunezindlela ezimbili eziyisisekelo zokuthulula ithusi, okungukuthi ukuthululwa kwethusi endaweni enkulu kanye ne-grid yethusi.Kuvame ukubuzwa ukuthi ukuthululwa kwethusi endaweni enkulu kungcono yini noma ukuthululwa kwe-grid yethusi kungcono.Akulungile ukuhlanganisa yonke into.
Kungani?Indawo enkulu yokumboza yethusi inemisebenzi emibili yokwandisa amandla amanje kanye nokuvikela.Kodwa-ke, uma i-copper esetshenziselwa indawo enkulu isetshenziselwa ukuhlanganisa amagagasi, ibhodi lingase liphakamise ngisho namabhamuza.Ngakho-ke, ukuze kuhlanganiswe indawo yethusi enkulu, ama-grooves amaningana avame ukuvulwa ukuze akhulule ama-blistering of the foil yethusi.Njengoba kuboniswe ngezansi:
Igridi ye-copper-clad isetshenziselwa ikakhulukazi ukuvikela, futhi umphumela wokwandisa okwamanje uyancipha.Ngokombono wokukhipha ukushisa, igridi inhle (inciphisa indawo yokushisa yethusi) futhi idlala indima yokuvikela i-electromagnetic ngezinga elithile.Ikakhulukazi kumasekhethi afana nokuthinta, njengoba kukhonjisiwe esithombeni esingezansi:
Kufanele kuphawulwe ukuthi igridi yenziwe ngokulandela umkhondo ezindaweni ezimile.Siyazi ukuthi kumjikelezo, ububanzi bomkhondo bunobude obuhambisanayo "kagesi" wemvamisa yokusebenza yebhodi lesifunda (usayizi wangempela uhlukaniswe Imvamisa yedijithali ehambisana nemvamisa yokusebenza iyatholakala, bheka izincwadi ezihlobene ukuze uthole imininingwane. ).
Lapho imvamisa yokusebenza ingephezulu kakhulu, mhlawumbe indima yomugqa wegridi ayibonakali kahle.Uma ubude bukagesi bufana nemvamisa yokusebenza, kubi kakhulu.Uzothola ukuthi i-PCB ayisebenzi nhlobo, futhi uhlelo lokuphazanyiswa lusebenza yonke indawo.isignali ye.
Isiphakamiso ukukhetha ngokuvumelana nesimo sokusebenza sebhodi lesifunda eliklanyelwe, ungabambeli entweni eyodwa.Ngakho-ke, isifunda se-high-frequency sinesidingo esiphezulu segridi yezinhloso eziningi zokulwa nokuphazamiseka, futhi isifunda se-low-frequency sinesifunda esikhulu samanje kanye nokunye okuvame ukusetshenziswa ithusi eliphelele.
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